<script>
import * as echarts from 'echarts'

export default {
  name: "appearance",
  methods: {
    renderEcharts() {
      const myChart = echarts.init(this.$refs.render);
      // 指定图表的配置项和数据
      const option = {
        legend: {
          top: 'bottom'
        },
        toolbox: {
          show: true,
          feature: {
            mark: {show: true},
            dataView: {show: true, readOnly: false},
            restore: {show: true},
            saveAsImage: {show: true}
          }
        },
        series: [
          {
            name: 'Nightingale Chart',
            type: 'pie',
            radius: [50, 250],
            center: ['50%', '50%'],
            roseType: 'area',
            itemStyle: {
              borderRadius: 8
            },
            data: [
              {value: 40, name: 'rose 1'},
              {value: 38, name: 'rose 2'},
              {value: 32, name: 'rose 3'},
              {value: 30, name: 'rose 4'},
              {value: 28, name: 'rose 5'},
              {value: 26, name: 'rose 6'},
              {value: 22, name: 'rose 7'},
              {value: 18, name: 'rose 8'}
            ]
          }
        ]
      };
      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option)
    }
  },
  mounted() {
    this.renderEcharts()
  }
}
</script>

<template>
  <el-card class="box-card">
    <div slot="header" class="clearfix">
      <span>数据可视化</span>
    </div>
    <div class="render" ref="render"></div>
  </el-card>
</template>

<style scoped lang="scss">
.render {
  width: 100%;
  height: 550px;
}
</style>
